mõõtesüsteemi või arvesti element, mida mõõtesuurust kandev nähtus, keha või aine otseselt mõjutab, mõõtevahendi või mõõteahela element, millele on otseselt rakendatud mõõtesuurus, element of the measuring system or of the meter that is directly affected by a phenomenon, body, or substance carrying a quantity to be measured, element of a measuring instrument or measuring chain to which a measurand is directly applied, device, module, machine, or subsystem whose purpose is to detect events or changes in its environment and send the information to other electronics, frequently a computer processor, mõõteahela esmane osa, element of a meter that is directly affected by a phenomenon, body or substance carrying aquantity to be measured